JP2019086733A - Tilt adjustment mechanism - Google Patents

Abstract

To provide a lens tilt adjustment mechanism which can easily adjust tilt of a lens.SOLUTION: A tilt adjustment mechanism for adjusting tilt of a lens unit mounted on a lens tube with respect to the lens tube includes: a first member which can be mounted on a connection section of the lens unit to be connected to the lens tube; a second member facing the first member and mounted on a connection section of the lens tube to be connected to the lens unit; a plurality of contact members fixed to the first member, projecting from the first member toward the second member, and brought into contact with the second member; and an adjusting/fixing member for adjusting tilt of the first member with respect to the second member, and fixing the first member to the second member. The second member includes an inclined surface to be brought into contact with the contact member. The contact member has a curved surface to be brought into contact with the inclined surface.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an inclination adjusting mechanism capable of adjusting the inclination of a lens unit or the like mounted on a lens barrel.

  For example, in an optical measuring device such as a microscope or an image measuring device, it may be desirable to adjust the tilt of the lens unit with respect to the lens barrel. In such a case, for example, a member attached to the lens unit or a member attached to the lens barrel is provided with a plurality of adjusting screws and fixing screws, and inclination adjustment is performed using these adjusting screws and fixing screws. Is possible (Patent Document 1).

JP, 2013-122485, A

  When adjusting the inclination of the lens using a plurality of adjustment screws, it is necessary to repeatedly adjust the heights of the plurality of adjustment screws while confirming the inclination of the lens. However, since the tilt direction of the lens is different for each adjustment screw, and the fulcrum of the lens tilt can not be determined, it is predicted which adjustment screw height can be adjusted to what degree the tilt of the lens can be adjusted in the desired direction. There is a problem that it can not be adjusted easily.

  The present invention has been made in view of such a point, and an object thereof is to provide an inclination adjusting mechanism capable of easily adjusting the inclination of a lens unit or the like attached to a lens barrel.

  In order to solve the problem, the tilt adjusting mechanism according to an embodiment of the present invention is a tilt adjusting mechanism capable of adjusting the tilt of the lens unit mounted on the lens barrel with respect to the lens barrel, and the lens barrel of the lens unit A first member mountable to the connecting portion with the second member, a second member mountable to the connecting portion between the first member and the lens unit of the lens barrel facing the first member, and fixed to the first member; A plurality of contact members projecting toward the members and in contact with the second member, and an adjustment / fixation member capable of adjusting the inclination of the first member with respect to the second member and fixing the first member to the second member; Equipped with The second member has an inclined surface on which the contact member abuts, and the contact member has a curved surface on which the inclined surface abuts.

  The tilt adjusting mechanism according to another embodiment of the present invention is a tilt adjusting mechanism capable of adjusting the tilt of the lens unit mounted on the lens barrel with respect to the lens barrel, and can be mounted on the connecting portion of the lens unit with the lens barrel. A first member, a second member which is attachable to the connecting portion between the first member and the lens unit of the lens barrel facing the first member, and is fixed to the second member and protrudes from the second member toward the first member; A plurality of contact members in contact with one member, and an adjustment / fixation member capable of adjusting the inclination of the first member with respect to the second member and fixing the first member to the second member. The first member has an inclined surface on which the contact member abuts, and the contact member has a curved surface on which the inclined surface abuts.

  The lens barrel can be provided with a first female screw, and the lens unit can be provided with a first male screw that can be screwed to the first female screw. Further, the first member may be provided with a second female screw that can be screwed with the first male screw, and can be configured to be detachable from the lens unit via the second female screw. Further, the second member may be provided with a second male screw which can be screwed with the first female screw, and can be detachably attached to the lens barrel through the second male screw.

  The inclined surface on which the contact member abuts may be a conical surface having an apex on the reference axis of the lens barrel or on the optical axis of the lens unit or a spherical surface having a center on the optical axis.

  Three contact members can be provided as the plurality of contact members. Further, the three contact members can be arranged evenly in the circumferential direction around the reference axis of the lens barrel or the optical axis of the lens unit.

  Three adjustment / fixing members can be provided as the plurality of adjustment / fixing members. In addition, these three adjustment / fixing members can be arranged evenly in the circumferential direction around the reference axis of the lens barrel or the optical axis of the lens unit. Moreover, it can arrange | position on the outer side of radial direction with respect to each of the said contact member.

  The first member can be provided with a through hole through which the adjusting / fixing member is inserted. Further, the second member may be provided with a female screw in which the adjustment / fixing member is screwed in a portion corresponding to the through hole of the first member. The adjusting / fixing member may have an outer diameter smaller than the inner diameter of the through hole of the first member, and may be an external thread screwed on the internal thread.

  The tilt adjusting mechanism according to an embodiment of the present invention is fixed to one of the first member, the second member facing the first member, and one of the first member and the second member, and from this one member to the other. A plurality of contact members that project toward the members and abut on the other members, and an adjustment / fixation member capable of adjusting the inclination of one member with respect to the other member and fixing one member to the other member. Equipped with The other member has an inclined surface on which the abutting member abuts, and the abutting member has a curved surface abutted on the inclined surface.

  According to the present invention, it is possible to provide a tilt adjusting mechanism capable of easily adjusting the tilt of the lens.

It is sectional drawing of the lens inclination adjustment mechanism which concerns on the 1st Embodiment of this invention. It is a bottom view of the lens inclination adjustment mechanism. It is a top view of the lens inclination adjustment mechanism. It is a typical sectional view showing how to use the lens inclination adjustment mechanism. It is sectional drawing of the lens inclination adjustment mechanism which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the lens inclination adjustment mechanism which concerns on the 3rd Embodiment of this invention.

First Embodiment
Next, with reference to FIGS. 1 to 3, a first embodiment of the present invention will be described. The tilt adjusting mechanism according to the present embodiment is a tilt adjusting unit 300 configured to be attachable to and detachable from the objective lens unit 100 and the lens barrel 200. The objective lens unit 100 can be mounted directly on the barrel 200 by screwing the male screw 134 (first male screw) with the female screw 201 (first female screw) of the barrel 200. However, in the present embodiment, the objective lens unit 100 is a mirror through the tilt adjustment unit 300 including the external thread 326 (second external thread) and the internal thread 311 (second internal thread) compatible with the external thread 134 and the internal thread 201. The tube 200 is attached.

  The objective lens unit 100 includes two objective lenses 110 aligned in the direction of the optical axis a1, two holding members 120 for holding the objective lenses 110, and a cover 130 for housing the objective lenses 110 and the holding members 120. Prepare. The objective lens 110 is, for example, a substantially disk-like convex lens. As shown in FIG. 2, the holding member 120 is formed in, for example, a substantially annular shape provided with an opening 121 at a central portion, and holds an outer peripheral portion of the objective lens 110. As shown in FIG. 1, the cover 130 includes a substantially cylindrical housing portion 131 centered on the optical axis a <b> 1 and a connection portion 132. The accommodation portion 131 accommodates the objective lens 110 and the holding member 120. The connection portion 132 protrudes from the housing portion 131 toward the lens barrel 200 along the direction of the optical axis a1, and a male screw 134 is formed on the outer peripheral surface thereof.

  The lens barrel 200 is, for example, a lens barrel of a microscope, an image measuring device, or the like, and is formed, for example, in a substantially cylindrical shape centered on the reference axis a2. An internal thread 201 is provided on the inner peripheral surface of the end of the lens barrel 200.

  The tilt adjustment unit 300 is configured to be able to adjust the tilt of the objective lens unit 100 with respect to the lens barrel 200. The tilt adjustment unit 300 is provided with a first member 310 attachable to a connection portion (male thread 134) of the objective lens unit 100 with the barrel 200, and the objective lens unit 100 of the barrel 200 facing the first member 310. And a plurality of abutments fixed to the first member 310 and projecting from the first member 310 toward the second member 320 and abutting on the second member 320. A member 330, and an adjusting / fixing member 340 capable of adjusting the inclination of the first member 310 with respect to the second member 320 and fixing the first member 310 to the second member 320.

  The first member 310 is formed in, for example, a substantially annular shape having an opening at a central portion. On the inner peripheral surface of the opening, a female screw 311 which can be screwed to the male screw 134 of the objective lens unit 100 is provided. The first member 310 is configured to be attachable to and detachable from the objective lens unit 100 via the female screw 311. Further, the surface of the first member 310 on the side of the objective lens unit 100 abuts on the cover 130 of the objective lens unit 100, whereby the positional relationship between the first member 310 and the objective lens unit 100 is fixed. Further, the first member 310 is provided with a through hole 312 through which the contact member 330 is inserted and a through hole 313 through which the adjustment / fixing member 340 is inserted. As shown in FIG. 2, the through holes 312 and the through holes 313 are formed at equal intervals of 120 ° circumferentially around the optical axis a1. In addition, the through holes 313 are arranged outside of the through holes 312 in the radial direction centering on the optical axis a1.

  As shown in FIG. 1, the second member 320 includes a substantially annular flange portion 321 and a connection portion 322 which protrudes from the flange portion 321 toward the lens barrel 200 along the direction of the reference axis a2. A conical inclined surface 323 with which the contact member 330 abuts is provided on the surface of the flange portion 321 on the objective lens unit 100 side. The inner diameter of the inclined surface 323 decreases as approaching the lens barrel 200 and increases as approaching the objective lens unit 100. The inclined surface 323 may be a conical surface having an apex on the reference axis a2, or may be a spherical surface having a center on the reference axis a2. The flange portion 321 is formed thicker than the first member 310. This is because the inclined surface 323 is provided on the flange portion 321. Further, the flange portion 321 is provided with a female screw 324 screwed to the adjustment / fixing member 340. The female screw 324 is formed at a position corresponding to the through hole 313 of the first member 310. That is, as shown in FIG. 3, they are formed at equal intervals of 120 ° in the circumferential direction around the reference axis a2. The connection part 322 is formed in a substantially cylindrical shape centering on the reference axis a2. As shown in FIG. 1, on the outer peripheral surface of the connection portion 322, a male screw 326 which can be screwed to the female screw 201 of the lens barrel 200 is provided. The second member 320 is configured to be attachable to and detachable from the barrel 200 via the male screw 326.

  The contact member 330 is, for example, a pin inserted into the through hole 312 of the first member 310, and is fixed to the first member 310 by an adhesive or the like. Further, the contact member 330 protrudes toward the second member 320 along the direction of the optical axis a1, and contacts the inclined surface 323 of the second member 320. The contact portion of the contact member 330 with the inclined surface 323 is a curved surface such as a spherical surface. Incidentally, as shown in FIG. 2, the tilt adjustment unit 300 is provided with three contact members 330. As shown in FIG. 1, these three abutment members 330 project from the first member 310 by the same length d1.

  The adjusting / fixing member 340 is, for example, an external thread that is inserted into the through hole 313 of the first member 310 and screwed to the internal thread 324 of the second member 320. The outer diameter of the adjustment / fixing member 340 is smaller than the inner diameter of the through hole 313 of the first member 310. For example, a coil spring may be provided between the first member 310 and the second member 320, and the adjustment / fixing member 340 may be inserted through the coil spring.

  Next, a method of using the tilt adjustment unit 300 will be described with reference to FIG. At the time of inclination adjustment, for example, one adjustment / fixing member 340 (male screw) is loosened, and at the same time, another one adjustment / fixing member 340 is tightened. Thereby, in a state where the contact member 330 in the vicinity of the remaining adjustment / fixing member 340 and the inclined surface 323 are in contact, the contact member 330 in the vicinity of the adjusted location is along the inclined surface 323 of the second member 320 Slide. As a result, the optical axis a1 of the objective lens 110 is inclined to the adjusting / fixing member 340 side tightened from the loosened adjusting / fixing member 340 side. Here, when the inclined surface 323 is a spherical surface or a conical surface that can be regarded as a spherical surface, a point at which normals extending from the contact point of the inclined surface 323 with the contact member 330 intersect is on the optical axis a1. Then, with this point as the fulcrum P, the objective lens unit 100, the first member 310, and the contact member 330 integrally tilt.

  The inclination of the objective lens unit 100 with respect to the lens barrel 200 can be adjusted by repeating the above adjustment as appropriate.

  Next, the effects of the present embodiment will be described. As described above, in optical measurement devices such as a microscope and an image measurement device, it may be desirable to adjust the tilt of the lens with respect to the lens barrel. However, for example, in the method of simply adjusting the height of the adjusting screw repeatedly, since the fulcrum of the lens inclination is not determined, the inclination of the lens can be adjusted in the desired direction by adjusting the height of any adjusting screw There was a problem that it was difficult to predict whether it was easy to adjust.

  In this respect, according to the present embodiment, the fulcrum of the inclination of the objective lens 110 can be set approximately at the fulcrum P on the optical axis a 1 of the objective lens 110. Therefore, it is easy to predict the direction in which the objective lens 110 tilts. Therefore, the tilt of the objective lens 110 can be easily adjusted. Further, in the configuration according to the present embodiment, the position of the fulcrum P can be adjusted to a desired position by adjusting the inclination angle or the like of the inclined surface 323.

Second Embodiment
Next, a second embodiment of the present invention will be described with reference to FIG. The lens tilt adjusting mechanism according to the present embodiment is a tilt adjusting unit 400. In the following description, parts that are the same as in the first embodiment are given the same reference numerals, and descriptions thereof will be omitted.

  The inclination adjustment unit 400 is basically configured in the same manner as the inclination adjustment unit 300 according to the first embodiment, but the contact member 330 is fixed to the second member 420 instead of the first member 310. The second embodiment is different from the tilt adjustment unit 300 in that the inclined surface 411 in contact with the contact member 330 is formed not in the second member 320 but in the first member 410.

  The inclined surface 411 is a conical inclined surface provided on the surface of the first member 410 on the lens barrel 200 side. The inner diameter of the inclined surface 411 increases as approaching the lens barrel 200 and decreases as approaching the objective lens unit 100. The inclined surface 411 may be a conical surface having an apex on the optical axis a1, or may be a spherical surface having a center on the optical axis a1. In the present embodiment, since the inclined surface 411 is formed not on the second member 320 but on the first member 410, the first member 410 is formed thicker than the flange portion 421 of the second member 420.

  Next, the effects of the present embodiment will be described. According to the present embodiment, the fulcrum of inclination of the objective lens 110 is determined not to be the fulcrum P on the optical axis a1 of the objective lens 110 (see FIG. 1), but to be approximately the fulcrum P ′ on the reference axis a2 of the lens barrel 200. I can do it. Also in such a mode, it is easy to predict the direction in which the objective lens 110 is inclined, and the inclination of the objective lens 110 can be easily adjusted. Further, by adjusting the inclination angle or the like of the inclined surface 411, the position of the fulcrum P 'can be adjusted to a desired position.

Third Embodiment
Next, a third embodiment of the present invention will be described with reference to FIG. The lens tilt adjusting mechanism according to the present embodiment is a tilt adjusting unit 500. In the following description, parts that are the same as in the first embodiment are given the same reference numerals, and descriptions thereof will be omitted.

  The inclination adjustment unit 500 is basically configured in the same manner as the inclination adjustment unit 300 according to the first embodiment, but the aspect of the inclined surface 523 abutting on the abutting member 330 is different. In the present embodiment, on the surface of the flange portion 521 of the second member 520 on the objective lens unit 100 side, a frusto-conical projecting portion 522 projecting toward the objective lens unit 100 side is provided. The inclined surface 523 is used. The outer diameter of the inclined surface 523 is larger as it approaches the lens barrel 200 side and smaller as it approaches the objective lens unit 100. The inclined surface 523 may be a conical surface having an apex on the reference axis a2, or may be a spherical surface having a center on the reference axis a2.

  Next, the effects of the present embodiment will be described. Also according to the present embodiment, as in the second embodiment, the fulcrum of the tilt of the objective lens 110 can be approximately determined as the fulcrum P ′ ′ on the reference axis a 2 of the lens barrel 200. Therefore, it is easy to predict the direction in which the objective lens 110 is inclined, and the inclination of the objective lens 110 can be easily adjusted. Further, the position of the fulcrum P ′ ′ can be adjusted to a desired position by adjusting the inclination angle of the inclined surface 523 or the like.

  In the third embodiment, as in the first embodiment, the contact member 330 is fixed to the first member 310, and the inclined surface 523 is provided on the second member 520. However, as in the second embodiment, the contact member 330 is fixed to the second member, and a truncated cone-shaped protrusion that protrudes toward the lens barrel 200 is provided on the surface of the first member on the lens barrel 200 side. The outer peripheral surface of the projecting portion may be an inclined surface. The outer diameter of such an inclined surface decreases as it approaches the barrel 200, and increases as it approaches the objective lens unit 100. Also according to this aspect, as in the first embodiment, the fulcrum of the tilt of the objective lens 110 can be set approximately on the optical axis a1 of the objective lens 110.

Other Embodiments
The lens tilt adjusting mechanism according to the first to third embodiments of the present invention has been described above. However, the first to third embodiments are merely examples, and aspects and the like of each configuration can be changed as appropriate.

  For example, the lens tilt adjusting mechanisms according to the first to third embodiments are tilt adjusting units 300, 400, and 500 configured to be detachable from the objective lens unit 100 and the lens barrel 200. However, in the tilt adjustment mechanism of the present invention, the first member 310 can be configured as a part of the objective lens unit 100, or the second member 320 can be configured as a part of the lens barrel 200. Further, the tilt adjusting mechanism according to the present invention can adjust not only the tilt of the lens with respect to the lens barrel but also the tilt of the other optical elements such as a prism, a mirror, and an imaging device with respect to the lens barrel. The inclination with respect to other members other than the lens barrel can also be adjusted.

  In the first to third embodiments, the contact member 330 is a pin extending along the optical axis a1 direction or the reference axis a2 direction. However, the contact member of the present invention does not have to extend along the optical axis a1 direction or the reference axis a2 direction, and can be inclined with respect to the optical axis a1 direction or the reference axis a2 direction. Further, the contact member 330 may be a member such as a ball other than the pin, as long as the contact portion with the inclined surface is a curved surface such as a spherical surface.

  DESCRIPTION OF SYMBOLS 100 ... Objective lens unit, 110 ... Objective lens, 200 ... Lens-barrel, 300 ... Tilt adjustment unit, 310 ... 1st member, 320 ... 2nd member, 323 ... Slope surface, 330 ... Abutment member, 340 ... Fixing member, a1 ... optical axis, a2 ... reference axis.

Claims (8)

A tilt adjusting mechanism capable of adjusting the tilt of a lens unit mounted on a lens barrel with respect to the lens barrel, the tilt adjusting mechanism comprising:
A first member mountable to a connecting portion of the lens unit with the lens barrel;
A second member that faces the first member and is attachable to a connection portion of the lens barrel with the lens unit;
A plurality of contact members fixed to the first member, projecting from the first member toward the second member, and contacting the second member;
An adjustment / fixing member capable of adjusting the inclination of the first member with respect to the second member and fixing the first member to the second member;
The second member includes an inclined surface on which the contact member abuts,
The tilt adjustment mechanism, wherein the contact member has a curved surface that contacts the inclined surface. A tilt adjusting mechanism capable of adjusting the tilt of a lens unit mounted on a lens barrel with respect to the lens barrel, the tilt adjusting mechanism comprising:
A first member mountable to a connecting portion of the lens unit with the lens barrel;
A second member that faces the first member and is attachable to a connection portion of the lens barrel with the lens unit;
A plurality of contact members fixed to the second member, projecting from the second member toward the first member, and contacting the first member;
An adjustment / fixing member capable of adjusting the inclination of the first member with respect to the second member and fixing the first member to the second member;
The first member includes an inclined surface on which the contact member abuts,
The tilt adjustment mechanism, wherein the contact member has a curved surface that contacts the inclined surface. The lens barrel is provided with a first female screw.
The lens unit is provided with a first male screw which can be screwed to the first female screw.
The first member has a second internal thread screwable with the first external thread, and is configured to be detachable from the lens unit via the second internal thread.
The second member has a second external thread screwable with the first internal thread, and is configured to be attachable to and detachable from the lens barrel via the second external thread. Or 2 inclination adjustment mechanisms. The inclined surface with which the contact member abuts is a conical surface having an apex on the reference axis of the lens barrel or on the optical axis of the lens unit, or a spherical surface having a center on the optical axis. The tilt adjustment mechanism according to any one of claims 1 to 3. The three contact members are provided as the plurality of contact members,
The three contact members are uniformly disposed in the circumferential direction centering on the reference axis of the lens barrel or the optical axis of the lens unit. Tilt adjustment mechanism. The three adjustment / fixing members are provided as the plurality of adjustment / fixing members,
The three adjustment / fixing members are
It is equally disposed circumferentially about the reference axis of the lens barrel or the optical axis of the lens unit,
The inclination adjusting mechanism according to claim 5, wherein the inclination adjusting mechanism is disposed radially outward with respect to each of the contact members. The first member has a through hole through which the adjusting / fixing member is inserted,
The second member has a female screw on which the adjustment / fixing member is screwed at a portion corresponding to the through hole of the first member,
The said adjustment / fixed member is an external thread which has an outer diameter smaller than the internal diameter of the through-hole of the said 1st member, and is an external thread screwed together to the said internal thread. Tilt adjustment mechanism. A first member,
A second member facing the first member;
A plurality of contact members fixed to one of the first member and the second member, projecting from the one member toward the other member and abutting on the other member;
An adjusting / fixing member capable of adjusting an inclination of the one member with respect to the other member and fixing the one member to the other member;
The other member comprises an inclined surface against which the contact member abuts,
The tilt adjustment mechanism, wherein the contact member has a curved surface that contacts the inclined surface.

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